JP5388425B2 - Mobile device integrated with external video signal display function - Google Patents

Description

  The present invention relates to a portable device, and more particularly to a portable device integrated with an external video signal display function.

  Recently, electronic devices are routinely used to process various events such as communication, schedule management or document processing. With the development of technology, the design of electronic devices is moving toward miniaturization and high portability. A portable device is a portable electronic device such as a notebook computer.

  In recent years, notebook computers tend to replace desktop computers as the cost of notebook computers is gradually reduced and their performance is catching up with desktop computers. In some developing countries, the market for notebook computers is growing faster than that for desktop computers. Notebook computers are replacing desktop computers in situations where both prices are balanced and their performance is close.

  As digital technology for home entertainment has improved, notebook computers have begun to support external video input. However, existing notebook computers can only support 480p or 480i standard definition (SD). Usually, the notebook computer receives external SD video via the AV terminal or S terminal, and then decodes the SD video into SD video by a video decoder.

  In today's market, many video / audio players (eg, high resolution DVD players), electronic game consoles (eg, XBOX 360, PS3) or digital cameras (eg, SONY HDR-HC3) have high resolution multimedia interfaces (high High resolution video output interfaces such as definition multimedia interface (HDMI) and digital visual interface (DVI) are beginning to be provided. However, to date there are still no notebook computers that can support the interface.

(Object of invention)
In order to solve the problems of the prior art, the present invention aims to provide a portable device integrated with an external video signal display function.

  The present invention provides a portable device integrated with an external video signal display function. The portable device includes a display panel, a display chip, a panel controller, and a video switching device. A display chip provides a first internal video. A panel controller receives the external video and converts the format to a second internal video. A video switching device is coupled to the display panel, the display chip and the panel controller, respectively, and receives the first internal video and the second internal video. The video switching device further receives an internal command and outputs the first internal video or the second internal video to the display panel based on the internal command. In this way, the display panel of the portable device can display the high resolution display signal input from the outside. Therefore, the portable device can be used as a monitor.

  In an exemplary embodiment of the invention, the portable device further includes an audio output device, an audio input interface, and an audio switching device. An audio input interface receives external audio. An audio switching device is coupled to the audio input interface and the audio output device, respectively, and receives the internal audio and external audio provided by the sound encoder / decoder, and the audio switching device is configured for internal audio or external audio based on internal instructions. Decide whether to output either to an audio output device.

  In the portable device of the exemplary embodiment of the present invention, internal instructions are provided by an embedded controller or south bridge chip. In an exemplary embodiment, the external audio interface can be a stereo input interface. The external video may be an HDMI signal, a DVI signal, an RGB signal, or a YPbPr signal, and the format of the first internal video and the second internal video is a low voltage differential signal (LVDS) format. . The sound encoder / decoder can be an AC97 encoder / decoder or an HD audio encoder / decoder.

  In an exemplary embodiment of the invention, the portable device further includes a video I / O device and an I / O switching device. The I / O switching device is coupled to the display chip and the video I / O device, respectively, and receives the output video signal and the internal command provided by the display chip, so that the I / O switching device outputs based on the internal command. A video signal can be output to a video I / O device.

  One aspect of the present invention provides a portable device that includes a video input interface, a display panel, a display chip, and a panel controller. A video input interface receives external video. A display chip outputs the internal video. Panel controllers are coupled to the video input interface, the display panel, and the display chip, respectively, and receive internal video and external video. A video switching device receives the internal command and outputs internal video or external video to the display panel based on the internal command.

  One aspect of the present invention provides a portable device integrated with an external video signal display function. The portable device includes a video input interface, a display panel, and a panel controller. A video input interface receives external video. A panel controller is coupled to the video input interface and the display panel and receives external video. After the panel controller converts the format of the external video, the converted external video is output to the display panel.

  In one embodiment of the present invention, a panel controller is incorporated in a portable device, and the panel controller can receive a high-resolution video signal input from the outside. Therefore, the portable device can be used as a monitor, and the display panel can be used. The high-resolution video signal input from the outside can be displayed. In some embodiments of the present invention, the panel controller further receives and integrates high resolution video signals input from external and internal video, and the panel controller displays a picture in the screen on its display panel. picture = PIP) or a screen (picture on picture = POP) is displayed on the screen. Thus, the portable device of the present invention, such as a notebook computer, can replace the screen of a TV or conventional desktop computer.

  In an exemplary embodiment of the present invention, a panel controller capable of receiving an external high resolution video signal is built in the portable device, so that the portable device can be used as a monitor for displaying the high resolution video signal input from the outside. it can. Furthermore, according to an exemplary embodiment of the present invention, the portable device can display the internal video generated by itself and the externally input high resolution video signal by displaying in PIP or POP format. . Thus, the portable device provided by the present invention can replace current television or conventional desktop computer monitors.

  FIG. 1 is a functional block diagram of a portable device according to a first exemplary embodiment of the present invention. In this embodiment, the portable device is a notebook computer, and in another embodiment, the portable device is a palmtop computer, tablet PC, ultra mobile personal computer (UMPC) personal digital assistant (PDA). ) Or mobile phone.

  In FIG. 1, the portable device includes a display panel 100, a display chip 101, a panel controller 102, and a video switching device 103. Video switching devices 103 are coupled to the display panel 100, the display chip 101, and the panel controller 102, respectively.

  The display chip 101 has an output interface 1011 and outputs the internal video IVS of the notebook computer, and the output video format is, for example, a low voltage differential signal = low voltage differential signal = LVDS) format. The panel controller 102 has an input interface 1021 and an output interface 1022, of which the input interface 1021 receives an external video OVS. In this embodiment, the external video OVS is an HDMI signal, but in other embodiments, the external video OVS can be a DVI signal, an RGB signal, a YPbPr signal, or other high-resolution video signal. The panel controller 102 receives the HDMI signal and converts it into a second internal video in the LVDS format that is acceptable to the display panel 100.

  The video switching device 103 includes a first video interface 1031, a second video interface 1032, and a video output interface 1033. The first video interface 1031 of the video switching device 103 is connected to the output interface 1011 of the display chip 101 and receives the internal video IVS output by the display chip 101. A second video interface 1032 of the video switching device 103 is coupled to the output interface 1022 of the panel controller 102 and receives an external video OVS provided by the panel controller 102. A video output interface 1033 of the video switching device 103 is connected to the display panel 100. The video switching device 103 determines whether the display panel 100 receives a signal from the first video interface 1031 or a signal from the second video interface 1032 based on an internal command. That is, the video switching device 103 uses the internal video IVS or the external video OVS whose format has been converted based on the internal command IT (in this case, the external video OVS whose format has been converted may be the second internal video). Which is output to the display panel 100 is determined.

  While the internal command can be generated by pressing a default function key of the mobile device, in other embodiments, the internal command presses a combination of keys (ie, a plurality of keys simultaneously or sequentially). Or by executing application software on the portable device.

  In the embodiment described above as an example, when the notebook computer is used as a monitor, the portable device (notebook computer) in this embodiment can be used in two power supply modes, that is, a normal mode and a power saving mode. In the normal power supply mode, power is supplied to all devices in the portable device system, such as a display panel, a CPU, a display chip, a chip set, a memory, and a hard disk. In the power saving mode, power is supplied only to the substrate for displaying the external high-resolution video signal, for example, power is supplied only to the display panel, the panel controller, and the video switching device. Thus, the display panel of a notebook computer can be used to reproduce images output by a high resolution DVD player or electronic game console.

  Here, after the user inputs the signal cable of the high resolution DVD player or the electronic game console to the video input terminal of the notebook computer, the input interface 1021 of the panel controller 102 is input from the outside through the video input terminal. Video OVS can be received. Subsequently, the user presses the function key of the notebook computer, and the video switching device 103 receives the internal command IT and switches the video signal path. For example, the video switching device 103 is electrically connected to the display panel 100 via the video switching device 103. The signal path of the displayed display chip 101 is switched to the signal path of the panel controller 102 electrically connected to the display panel 100 via the video switching device 103, and the external video OVS is displayed via the panel controller 102 and the video switching device 103. Can be sent to panel 100. Therefore, the notebook computer in the present embodiment can realize the function of the monitor or replace the high resolution TV.

  Further, in the above embodiment, since the operation is performed by pressing a function key of the notebook computer, a person skilled in the art can refer to this embodiment as a monitor without turning on the notebook computer. Since the function of using the notebook computer can be realized, the power consumption of the notebook computer can be reduced (power saving mode). Of course, in other embodiments, the notebook computer can operate in the normal power supply mode to switch the display.

  FIG. 2A is a functional block diagram of a portable device according to the second exemplary embodiment of the present invention. In FIG. 2A, similarly, a notebook computer is used as an example of a portable device. The notebook computer includes a display panel 200, a display chip 201, a video input interface 202, and a panel controller 203. The video input interface 202 receives the external video OVS, but here, similarly, high definition multimedia interface (HDMI) video is used as an example of the external video. The display chip 201 outputs the internal video IVS, where a typical RGB format signal is used as an example of the internal video IVS. The panel controller 203 has a first input interface 2031, a second input interface 2032, and an output interface 2033, of which the first input interface 2031 is connected to the video input interface 202 to receive an external video OVS, The second input interface 2032 is connected to the display chip 201 to receive the internal video IVS, and the external interface 2033 is connected to the display panel 200. The panel controller 203 can select the external video OVS (HDMI) or the internal video IVS (VGA signal) as an output signal based on the internal command IT and transmit it to the drive chip of the display panel 200.

  The difference between the embodiment of FIG. 1 and the embodiment of FIG. 2A is that, in the embodiment shown in FIG. 2A, the panel controller 203 receives the internal video IVS and the external video OVS at the same time, and the display panel 200 is based on the internal command IT. Determining whether to display the external video OVS or the internal video IVS. When the user wants to use the notebook computer as a monitor of a high-resolution DVD player or electronic game console, the user presses the function key of the notebook computer, and the signal generated by the function key by the notebook computer is sent to the internal command IT. Can be converted to Subsequently, after the panel controller 203 receives the internal command IT, the panel controller 203 converts the external video OVS into an LVDS format acceptable by the display panel 200, and the display panel 200 can display the external video OVS.

  Further, the panel controller 203 is usually provided by a scaler IC in the current technology. Taking the current high-level scaler IC as an example, the scaler IC usually supports the screen function (picture in picture = PIP) or the screen on picture (picture on picture = POP) function, and such a scaler IC. Is usually placed in a built-in frame buffer. In other embodiments, the panel controller 203 can be replaced by a high-level scaler IC with PIP or POP functionality, so that the user can issue commands via the function keys of the notebook computer. Is converted into an internal command IT through the above mechanism and transmitted to the panel controller 203 to display a PIP or POP image on the display panel 200.

  It should be noted that the portable device in this embodiment can be used in two power supply modes: a normal mode and a power saving mode. In the normal power supply mode, current is supplied to all devices in the portable device system. In the power saving mode, current is supplied only to the substrate for displaying the external high-resolution video signal, and for example, current is supplied only to the display panel and the panel controller.

  FIG. 2B is a functional block diagram of a portable device according to the third exemplary embodiment of the present invention. In FIG. 2B, similarly, a notebook computer is used here as an example of a portable device, similar to the notebook computer in FIG. 2A. In this embodiment, a frame buffer 204, an I / O switching device 205, and a video I / O device 206 are further included.

  The I / O switching device 205 has an input interface 2051, an output interface 2052, and an I / O interface 2053, which are connected to the display chip 201, the panel controller 203, and the video I / O device 206, respectively. In this embodiment, the video I / O device 206 is a D-SUB (D-Subminiature) interface connected to the projector, but in other embodiments, the video I / O device is another equivalent video interface. There can also be.

  When a user tries to connect a notebook computer to a projector for briefing, an internal video output command is generated by pressing a function key on the notebook computer, and the notebook computer outputs the internal video output command. After converting into the internal command IT, the internal command is transmitted to the I / O switching device 205. The I / O switching device 205 transmits the internal video IVS to the D-SUB interface 206 in response to the internal command IT.

  When the notebook computer is used as a monitor, the video input interface 202 is coupled to the high resolution output video of a high resolution DVD player or electronic game console. In this case, after the function key of the notebook computer is pressed, the panel controller 203 receives both the external video OVS and the internal video IVS provided by the display chip 201, and the external video OVS and the internal video IVS are received by the frame buffer 204. Recorded and integrated, the display panel 200 can display PIP or POP.

  Further, the D-SUB interface 206 in this embodiment can be connected to an external video. For example, when a notebook computer is used as a monitor, the user first connects a corresponding signal source to the D-SUB interface 206, and then the user inputs a D-SUB input command via a function key of the notebook computer. Issue. The notebook computer converts the D-SUB input command into the internal command IT, and transmits the internal command IT to the I / O switching device 205. The I / O switching device 205 transmits a signal input from the D-SUB interface 206 to the panel controller 203 in response to the internal command IT. Next, the panel controller 203 converts the video signal received by the second input interface 2032 into a format acceptable by the display panel 200, so that the display panel 200 displays the video input by the D-SUB interface 206. be able to. Of course, here, the video input interface 202 can also receive the external video OVS at the same time.

  A similar point between this embodiment and the above embodiment is that any video signal is transmitted to the display panel 200 via the panel controller 203. As described above, when the panel controller 203 has the PIP or POP function, the portable device uses the PIP or POP method with the assistance of the frame buffer 204 to output video input from the external video OVS, internal video IVS or D-SUB interface 206. Two of them can be displayed simultaneously.

  It should be noted that although the implementation pattern of the mobile device integrated with the external video signal display function is described in the above embodiment, the design of the mobile device may vary depending on the manufacturer as will be understood by those skilled in the art. It is different and, therefore, the present invention is not limited to application in notebook computers. In other words, the present invention is a portable device that includes a video input interface for receiving external video, a panel controller coupled to the video input interface, and a display panel for displaying converted external video received by the panel controller. Can be applied.

  Some embodiments of the present invention are further described below so that those skilled in the art can easily practice the present invention.

  FIG. 3 is a functional block diagram of a portable device according to the fourth exemplary embodiment of the present invention. This embodiment is similar to the embodiment described in FIG. 1, but further audio processing is performed in this embodiment, details of which are referred to FIG.

  In this embodiment, in addition to the display panel 200, the display chip 101, the panel controller 102, and the video switching device 103, the portable device further includes an embedded controller 301, a video I / O device 302, an I / O An O switching device 303, an audio output device 304, an internal audio provider 305, an audio input interface 306, and an audio switching device 307 are included.

  Embedded controllers 301 are coupled to external input devices (eg, keyboard or notebook computer function keys), video switching device 103, I / O switching device 303, and audio switching device 307, respectively. Therefore, when the notebook computer is used to display the external video OVS, the embedded controller 301 receives the input command only by pressing the keyboard or the function key of the notebook computer, and then the internal command IT is output to control the video switching device 103 and cause the display panel 100 to receive the external video OVS in the LVDS format. Of course, the embedded controller 301 can also control switching of the I / O switching device 303 and the audio switching device 307 as described below.

  In the present embodiment, the audio input interface 306 is a stereo input interface that receives external audio OAS (including analog stereo and HDMI digital audio). Audio switching devices 307 are coupled to the audio input interface 306, the internal audio provider 305, the audio output device 304, and the embedded controller 301, respectively.

  In this embodiment, the internal audio provider 305 is a typical sound encoder / decoder, such as an AC97 encoder / decoder or an HD audio encoder / decoder, used by a notebook computer to produce an internal audio IAS. In other embodiments, the internal audio provider 305 can be an audio decoder of other specifications. Further, in this embodiment, the audio output device 304 is a notebook computer built-in speaker, but in other embodiments, the audio output device 304 can be an external speaker or other type of broadcast device.

  The audio switching device 307 receives the internal audio generated by the sound encoder / decoder and the external audio received by the stereo input interface 306, and the audio switching device 307 further selects internal audio or external audio based on the internal command IT. It is determined whether to output to the audio output device 304. The operation is as follows.

  The internal command IT generated by the embedded controller 301 is output to the video switching device 103 when the notebook computer keyboard or function key is pressed and the notebook computer can display the external video OVS. Are output to the audio switching device 307. When the audio switching device 307 receives the internal command IT, the audio switching device 307 transmits the external audio OAS input by the audio input interface 306 to the audio output device 304.

  It should be noted in the present embodiment that when the notebook computer is used as a monitor for displaying the high resolution external video OVS and playing the external audio OAS through its built-in speaker, the notebook computer is in the power saving mode. It can be operated with. For example, in the power saving mode, only the substrate for displaying the high resolution video signal is supplied with current, thereby reducing current consumption. For example, the display panel 100, the panel controller 102, and the video switching device 103 Only the embedded controller 301, the video I / O device 302, the I / O switching device 303, the audio output device 304, and the audio switching device 307 are powered. Of course, in other embodiments, the notebook computer may operate in the normal power supply mode to execute the above operation.

  When the notebook computer keyboard or function key or other default key is pressed to return the notebook computer to the normal mode again and display the internal video IVS, the embedded controller 301 receives the corresponding internal command IT here. Since the internal command IT is output to the video switching device 103 and the audio switching device 307, the audio switching device 307 switches the audio path after the audio switching device 307 receives the internal command IT. Accordingly, the internal audio IAS generated by the internal audio provider (AC97 or HD audio) is output to the audio output device 304.

  Further, the I / O switching device 303 in this embodiment is connected to the display chip 101, the panel controller 102, the video I / O device 302, and the embedded controller 301, respectively. In this embodiment, the video I / O device 302 is a D-SUB interface, but in other embodiments, the video I / O device 302 can be another video interface.

  The I / O switching device 303 receives the output video signal provided by the display chip 101 and the internal command IT, and the I / O switching device 303 further converts the video signal to the video I / O device based on the internal command IT. The external video signal received by the video I / O device 302 is output to the panel controller 102. The operation is as described below with an example.

  When a notebook computer keyboard or function key is pressed to cause the notebook computer to output video to an external display device (e.g., a projector), the embedded controller 301 outputs a corresponding internal command IT, and I / O Since the switching device 303 is controlled, the output video signal (RGBout) generated by the display chip 101 can be output to the external display device via the video I / O device (D-SUB interface) 302.

  When the keyboard or function key of the notebook computer is pressed to cause the notebook computer to receive an external video signal via the video I / O device (D-SUB interface) 302, the embedded controller 301 corresponds to the internal command IT. And the internal command IT is output to the I / O switching device 303 and the video switching device 103, so that the video signal input from the video I / O device 302 is transmitted to the panel controller 102. Thereafter, the signal received by the panel controller 102 is converted into an LVDS format acceptable for the display panel 100, and the video switching device 103 performs switching, so that the display panel 100 displays the signal output by the panel controller 102. Can do. Therefore, the portable device in this embodiment can be used as a monitor for a desktop computer.

  In the above embodiment, the embedded controller 301 is used to create internal instructions, but as will be appreciated by those skilled in the art, the embedded controller 301 can be replaced by a south bridge chip, which is not described here.

  FIG. 4 is a functional block diagram of a portable device according to the fifth exemplary embodiment of the present invention. This embodiment is similar to the second embodiment described in FIG. However, in this embodiment, audio processing and a south bridge chip are added, and see FIG. 4 for details.

  In this embodiment, in addition to the display panel 200, the display chip 201, the video input interface 202, and the panel controller 203, the portable device further includes a south bridge chip 401, a video I / O device 402, and an I / O. An O switching device 403, an audio output device 404, an internal audio provider 405, an audio input interface 406, and an audio switching device 407 are included.

  Each of the south bridges 401 is connected to an external input device (for example, a keyboard or function key of a notebook computer), a panel controller 203, an I / O switching device 403, and an audio switching device 407. When the notebook computer keyboard or function key is pressed to display the external video OVS on the notebook computer, the internal command IT generated by the south bridge chip 401 is transmitted to the panel controller 203 to control the panel controller 203. Since the video path is switched, the display panel 200 can receive the external video OVS in the LVDS format.

  In this embodiment, the connection, function and operation of the audio output device 404, the internal audio provider 405, the audio input interface 406, and the audio switching device 407 are similar to those in the embodiment described in FIG. I will not explain it again. Further, in the present embodiment, the description of the video I / O device 402 and the I / O switching device 403 is also similar to those in the fourth embodiment described above, and will not be described here.

  The video input interface 202 and the video I / O devices 206, 302, and 402 in the embodiment described in FIGS. 2A, 2B, 3, and 4 are all video provided by different adapters depending on the video adapter used. Can be received. FIG. 5 is a functional block diagram of a portable device according to the sixth exemplary embodiment of the present invention. The difference between the embodiment in FIG. 5 and the embodiment in FIG. 4 is that the video input interface 202 in FIG. 4 is replaced with the HDMI interface 501 in FIG. 5, and the video I / O device 402 in FIG. In this embodiment, a video adapter 503 that converts an HDMI male plug into a DVI female socket and an adapter 504 that converts a DVI male plug into a D-SUB female socket are further included.

  If the user wants to input an external video OVS in DVI format and display it on the screen of a notebook computer, the video adapter 503 converts the HDMI male plug to the DVI female socket to the video I / O device 402 It can be input by connecting. If the user wants to input video in D-SUB format, the D-SUB format can be input to the notebook computer via an adapter 504 that converts a DVI male plug to a D-SUB female socket. The main advantage of using a video adapter is that when a notebook computer is manufactured, the various video inputs use one type instead of using a type for D-SUB video and a type for DVI video. Therefore, product competitiveness can be improved and the manufacturing cost can be reduced.

  As described above, the present invention has been disclosed in the best mode. However, the present invention is not intended to limit the present invention. Since appropriate changes and modifications can be naturally made, the scope of protection of the patent right must be determined on the basis of the scope of claims and an area equivalent thereto.

1 is a functional block diagram of a mobile device according to a first exemplary embodiment of the present invention. FIG. (A) is a functional block diagram of the portable device which concerns on 2nd typical embodiment of this invention. (B) is a functional block diagram of a portable device according to a third exemplary embodiment of the present invention. It is a functional block diagram of the portable device which concerns on 4th typical embodiment of this invention. FIG. 10 is a functional block diagram of a mobile device according to a fifth exemplary embodiment of the present invention. It is a functional block diagram of the portable device which concerns on 6th typical embodiment of this invention.

Explanation of symbols

100 display panel 101 display chip 1011 output interface 102 panel controller 1021 input interface 1022 output interface 103 video switching device 1031 first video interface 1032 second video interface 1033 video output interface 200 display panel 201 display chip 202 video input interface 203 panel controller 2031 First input interface 2032 Second input interface 2033 Output interface 204 Frame buffer 205 I / O switching device 2051 Input interface 2052 Output interface 2053 I / O interface 206 Video I / O device 301 Built-in Controller 302 Video I / O device 303 I / O switching device 304 Audio output device 305 Internal audio provider 306 Audio input interface 307 Audio switching device 401 South bridge chip 402 Video I / O device 403 I / O switching device 404 Audio output device 405 Internal audio provider 406 Audio input interface 407 Audio switching device 501 HDMI interface 502 DVI interface 503 Video adapter 504 Adapter IAS Internal audio IT Internal instruction IVS Internal video OAS External audio OVS External video

Claims (9)

A display panel;
A display chip providing a first internal video;
A panel controller that receives external video and converts the format of the external video to a second internal video;
Connected to each of the display panel , the display chip , and the panel controller that receives the first internal video and the second internal video, receives an internal command, and follows the internal instructions, the first internal video or A video switching device for switching the second internal video to output to the panel controller ;
A video I / O device;
Wherein each connected display chip and the said video I / O devices, receives the output video signal and the internal instructions provided by the display chip, the video I / O device the output video signal based on the internal command An I / O switching device to output to
A portable device integrated with an external video signal display function. An audio output device;
An audio input interface for receiving external audio;
An audio switching device coupled to the audio output device and the audio input interface, respectively, for receiving internal audio and the external audio;
The portable device according to claim 1, wherein the audio switching device determines whether to output either the internal audio or the external audio to the audio output device based on the internal command.   The portable device of claim 2, wherein the internal audio is generated by a sound encoder / decoder. A video input interface for receiving external video;
A display panel;
A display chip that outputs internal video,
The video input interface, the display panel, and the display chip are connected to receive the internal video, the external video, and an internal command, respectively, and a video switching device receives the internal video or the external video based on the internal command. A portable device integrated with an external video signal display function, comprising: a panel controller for outputting to the display panel. An audio output device;
An audio input interface for receiving external audio;
An audio switching device connected to the audio output device and the audio input interface, respectively, for receiving internal audio and the external audio;
The portable device according to claim 4, wherein the audio switching device determines whether to output either the internal audio or the external audio to the audio output device based on the internal command. A video I / O device;
Connected to the display chip and the video I / O device, respectively, receives an output video signal and the internal command provided by the display chip, and outputs the output video signal based on the internal command to the video I / O device. I / O switching device to output to
The portable device according to claim 4, further comprising: A video input interface for receiving external video;
A display panel;
A panel controller connected to the video input interface and the display panel for receiving the external video, converting the format of the external video, and then outputting the external video having the converted format to the display panel;
A portable device integrated with an external video signal display function. A display chip providing a first internal video;
A video switching device connected to the display chip, the panel controller and the display panel, respectively, for receiving the first internal video and the external video in a converted format;
8. The portable device according to claim 7, wherein the video switching device receives an internal command and outputs the internal video or an external video obtained by converting the format based on the internal command to the display panel. A video I / O device;
Connected to the display chip and the video I / O device, respectively, receives an output video signal provided by the display chip and the internal command, and converts the output video signal based on the internal command to the video I / O. An I / O switching device that can output to the device;
The portable device of claim 8 further comprising:

Images